The MM2-Pro is the largest in Monster's line of 2-roller Monster Mills and is among the best milling products available. The Pro model upgrades the rollers to 2" diameter, adds the billet aluminum knobs, as well as the 1/2" drive shaft as standard. It consists of a 6061 aluminum block frame with two 6" long, and 2" diameter steel rollers riding on SAE 841 oil impregnated bronze bushings. They use a superior grade of steel (1144 alloy) that is much harder than what is found on most comparable products and should last almost twice as long. The drive shaft, and all the axles are integral to the roller rather than screwed into the ends. This makes it fine to drive the mill clockwise, or counter-clockwise. All the axles are 3/8", with minimal freeplay in the bushings, and the larger 1/2" shaft comes standard. The larger 2" diameter rollers allow a finer crush with more minimal husk damage, and milling at smaller gap settings without worry of skipping. This mill also comes with a much larger gap adjustment range of .160", more than double the standard range that should allow you to mill other grains like corn, as well as the conventional grist bills with barley.
6" Long Adjustable Gap: